1- does the effect of brron mad king of dark world activates in the damage step? Can your oponent activate torrential tribute or bottomless trap hole when you summon a dark world monster with his effect?

2 - Does Necrovalley negates the effect of the Dark World monsters?

1. Yep its in the damage step. If you Discard Sillva, Goldd or Biege and thier effects activates the Special Summon will be within the Damage step and torrential can't be used.

2. nope.

The End of Anubis will negate their effects of being specail summoned and their effect of being discarded by your oppoent.

Don't recall the End of Anubis in the question but ok.

The End of Anubis will negate the Special Summoning of Sillva, Goldd, and Biege but it will not negate Bronn's ability to discard them. That effect doesn't target cards in the graveyard nor does it activate in the graveyard.

1. Yes to Brron's discard. No to the Torrential and Bottomless in the Damage Step question.

2. No since they themselves activate in the graveyard which Necrovalley can't stop.